package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {
    /**
     * 新增菜品和对应的口味
     *
     * @param dishDTO
     */


    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    /**
     * 新增菜品和相关口味数据
     * @param dishDTO
     */
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {

        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);

        //向菜品插入一条数据
        dishMapper.insert(dish);

        //获取insert语句生成的id,添加到口味表的dishId
        Long dishId = dish.getId();

        List<DishFlavor> flavors = dishDTO.getFlavors();

        if (flavors != null && flavors.size() > 0) {
            //给每一条都插入dishId
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });

            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }

    }

    /**
     * 菜品分页查询
     */
    @Transactional
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 根据id删除（可以批量）
     *
     * @param ids
     * @return
     */
    public void deleteBatch(List<Long> ids) {
        //判断当前菜品是否为起售状态
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus() == StatusConstant.ENABLE) {
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }

        //判断当前菜品是否被套餐关联
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if (setmealIds != null && setmealIds.size() > 0) {
            throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
        }


//        for (Long id : ids) {
//            //删除菜品中的数据
//            dishMapper.deleteByid(id);
//            //删除关联口味表中的数据
//            dishFlavorMapper.deleteByDishId(id);
//        }

        /**
         * 优化上边的删除
         * 因为每一次for循环都要进行2个sql语句
         * 让他进行一次批量删除id
         */
        //删除菜品中的数据
        dishMapper.deleteByIds(ids);
        //删除关联口味表中的数据
        dishFlavorMapper.deleteByDishIds(ids);
    }

    /**
     * 根据id查询菜品及对应的口味
     *
     * @param id
     * @return
     */
    public DishVO getByIdWithFlavor(Long id) {
        //获取菜品数据
        Dish dish = dishMapper.getById(id);
//        获取口味数据
        List<DishFlavor> flavors = dishFlavorMapper.getByDishId(id);
        //封装到dishVO
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(flavors);
        return dishVO;
    }

    /**
     * 根据id修改菜品
     *
     * @param dishDTO
     * @return
     */
    @Transactional
    public void updateWithFlavor(DishDTO dishDTO) {
        //更新菜品的基本信息
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.update(dish);

        //更新新菜品的口味数据
        //先删除原来的口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        //再插入新的口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();

        if (flavors != null && flavors.size() > 0) {
            //新增的口味数据中的dish_id要重新设置菜品id
            flavors.forEach(flovor -> flovor.setDishId(dishDTO.getId()));//ForEach循环插入

            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 启用禁用菜品状态
     *
     * @param status
     * @param id
     * @return
     */
    public void startOrStop(Integer status, Long id) {
//        Dish dish = new Dish();
//        dish.setId(id);
//        dish.setStatus(status);

        //利用builder实现更简洁的构造
        //由于启用禁用员工操作属于update,可以设置update通用方法,传入对象,根据对象数据的不同实现不同的修改
        Dish dish=Dish.builder()
                .id(id)
                .status(status)
                .build();
        dishMapper.update(dish);
    }

    /**
     * 根据菜品分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> listByCategoryId(Long categoryId) {
        return dishMapper.listByCategoryId(categoryId);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
